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Partager le résultat de cette recherche Interroger des sources externesCaractérisation et analyse des cellules solaires à base de silicium multicristallin / Zohra Benmohamed
Titre : Caractérisation et analyse des cellules solaires à base de silicium multicristallin Type de document : texte imprimé Auteurs : Zohra Benmohamed ; Univ. de Constantine, Éditeur scientifique ; Mohamed Remram, Directeur de thèse Année de publication : 2009 Importance : 95 f. Format : 30 cm Note générale : 01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD Langues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : Caractérisation Analyse Cellules solaires Silicium multicristallin Impurities Dislocations Multicrystalline silicon Solar cells Efficiency
الشوائب العيوب البنيوية السليسيوم متعدد البلوراتالخلايا الشمسية المردودIndex. décimale : 621 Electronique Résumé : An understanding of the comportment of defects and Impurities in multicrystalline silicon in turn leads
to a clearer picture of the limiting mechanisms in solar cells made with this promising material, and points to
possible paths for improvement. In this study a three diagnostic approach has been adopted for the
characterization of multicrystalline silicon samples, it comprises structural, chemical and electrical analysis of
the various minority diffusion length limiting defects and impurities which are responsible for the degradation of
the performances of multicrystalline silicon solar cells.
Preferential defect etching ions provided for the structural analysis. This approach was useful in
determining the nature and distribution of the structural defects. The work then focuses on chemical
characterization of impurities and the analytical tool used for this purpose were Fourier Transform Infra-red
Spectroscopy (FTIR). The results of annealing processes shown that, Rapid Thermal Annealing can dissociate
some oxygen precipitates existing in silicon material. This dissociation is accompanied by a degradation of the
bulk diffusion length. The effect of RTA on oxygen precipitation is extensively depending on the thermal history
of the material, the initial oxygen content and the existing precipitates in the material.
The above characterization tools were well complemented by electrical characterization through
Surface photovoltage (SPV) to determined minority diffusion length.
The results of PC1D modelling on multicrystalline silicon solar cells revealed that dislocations are not
the major factor that influences electrical properties of material. Impurities which were already present in the
grown material in an inactive form in particular the growth of oxygen precipitates and metallic impurities and
which have been electrically activated in an inhomogeneous distribution are also a principal source of
deterioration of polycrystalline silicon solar cells performances.
Thus there is a scope for attaining still higher efficiencies by further optimization of growth material
and cell processes to reduce reflection loss and effectively trapping the light inside the cell.Diplôme : Doctorat en sciences En ligne : ../theses/electronique/BEN5287.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=2774 Caractérisation et analyse des cellules solaires à base de silicium multicristallin [texte imprimé] / Zohra Benmohamed ; Univ. de Constantine, Éditeur scientifique ; Mohamed Remram, Directeur de thèse . - 2009 . - 95 f. ; 30 cm.
01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : Caractérisation Analyse Cellules solaires Silicium multicristallin Impurities Dislocations Multicrystalline silicon Solar cells Efficiency
الشوائب العيوب البنيوية السليسيوم متعدد البلوراتالخلايا الشمسية المردودIndex. décimale : 621 Electronique Résumé : An understanding of the comportment of defects and Impurities in multicrystalline silicon in turn leads
to a clearer picture of the limiting mechanisms in solar cells made with this promising material, and points to
possible paths for improvement. In this study a three diagnostic approach has been adopted for the
characterization of multicrystalline silicon samples, it comprises structural, chemical and electrical analysis of
the various minority diffusion length limiting defects and impurities which are responsible for the degradation of
the performances of multicrystalline silicon solar cells.
Preferential defect etching ions provided for the structural analysis. This approach was useful in
determining the nature and distribution of the structural defects. The work then focuses on chemical
characterization of impurities and the analytical tool used for this purpose were Fourier Transform Infra-red
Spectroscopy (FTIR). The results of annealing processes shown that, Rapid Thermal Annealing can dissociate
some oxygen precipitates existing in silicon material. This dissociation is accompanied by a degradation of the
bulk diffusion length. The effect of RTA on oxygen precipitation is extensively depending on the thermal history
of the material, the initial oxygen content and the existing precipitates in the material.
The above characterization tools were well complemented by electrical characterization through
Surface photovoltage (SPV) to determined minority diffusion length.
The results of PC1D modelling on multicrystalline silicon solar cells revealed that dislocations are not
the major factor that influences electrical properties of material. Impurities which were already present in the
grown material in an inactive form in particular the growth of oxygen precipitates and metallic impurities and
which have been electrically activated in an inhomogeneous distribution are also a principal source of
deterioration of polycrystalline silicon solar cells performances.
Thus there is a scope for attaining still higher efficiencies by further optimization of growth material
and cell processes to reduce reflection loss and effectively trapping the light inside the cell.Diplôme : Doctorat en sciences En ligne : ../theses/electronique/BEN5287.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=2774 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BEN/5287 BEN/5287 Thèse Bibliothèque principale Thèses Disponible
Titre : Réalisation et caractérisation optoélectronique de cellules solaires hybrides à colorants à base de ZnO Type de document : texte imprimé Auteurs : Mourad Boucharef ; Univ. de Constantine, Éditeur scientifique ; Mohamed Seghir Boumaza, Directeur de thèse Année de publication : 2010 Importance : 147 f. Note générale : 01 Disponible à la salle de recherche 01 Disponible au magazin de la B.U.C. 01 CD Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Photovoltaique Semiconducteur Cellules solaires Colorants Conducteurs de trous Index. décimale : 530 Physique En ligne : ../theses/physique/BOU5779.pdf Permalink : index.php?lvl=notice_display&id=3552 Réalisation et caractérisation optoélectronique de cellules solaires hybrides à colorants à base de ZnO [texte imprimé] / Mourad Boucharef ; Univ. de Constantine, Éditeur scientifique ; Mohamed Seghir Boumaza, Directeur de thèse . - 2010 . - 147 f.
01 Disponible à la salle de recherche 01 Disponible au magazin de la B.U.C. 01 CD
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Photovoltaique Semiconducteur Cellules solaires Colorants Conducteurs de trous Index. décimale : 530 Physique En ligne : ../theses/physique/BOU5779.pdf Permalink : index.php?lvl=notice_display&id=3552 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/5779 BOU/5779 Thèse Bibliothèque principale Thèses Disponible
Titre : Simulation des performances des cellules solaires à base de matériaux organiques Type de document : texte imprimé Auteurs : Walid Guanoune, Auteur ; R. Labbani, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2015 Importance : 87 f. Format : 30 cm. Note générale : 2 copies imprimes disponibles Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Science des matériaux semi-conducteur
solar cells simulation organic materials cellules solaires matériaux organiques خلايا شمسية المحاكاة مواد عضويةIndex. décimale : 530 Physique Résumé : Renewable energies are particularly interesting. Indeed, they are permanent, clean
and no dangerous for environment. In this work, we were interested by photovoltaic
solar energy. It is obtained by direct conversion of solar rays into electricity. Many
branches exist in this field. They are characterized by the employed materials and
the involved technology. However, the ratio price/efficiency is the main problem.
Actually, the branch organic materials become an interesting field of research
because of their lower prices. However, the efficiency of these based solar cells are
very low.
In this work, we have performed an investigation by simulation to predict the output
characteristics of such solar cells. We have used the AMPS-1D software which has
been released with the permission of Penn Sylvania State University. We have
studied two structures where the active layer was based on poly(3-hexylthiophen)
(P3HT) and [6-6]-phenyl-C61-butanoate of methyl (PCBM) materials. We have
performed considerable efforts to run the program and obtain favorable efficiencies.
Several parameters have been taken into account such as the thickness of the active
layer and temperature. The obtained results were good and in agreement with
literature.Diplôme : Magistère En ligne : ../theses/physique/GUA6844.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10142 Simulation des performances des cellules solaires à base de matériaux organiques [texte imprimé] / Walid Guanoune, Auteur ; R. Labbani, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2015 . - 87 f. ; 30 cm.
2 copies imprimes disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Science des matériaux semi-conducteur
solar cells simulation organic materials cellules solaires matériaux organiques خلايا شمسية المحاكاة مواد عضويةIndex. décimale : 530 Physique Résumé : Renewable energies are particularly interesting. Indeed, they are permanent, clean
and no dangerous for environment. In this work, we were interested by photovoltaic
solar energy. It is obtained by direct conversion of solar rays into electricity. Many
branches exist in this field. They are characterized by the employed materials and
the involved technology. However, the ratio price/efficiency is the main problem.
Actually, the branch organic materials become an interesting field of research
because of their lower prices. However, the efficiency of these based solar cells are
very low.
In this work, we have performed an investigation by simulation to predict the output
characteristics of such solar cells. We have used the AMPS-1D software which has
been released with the permission of Penn Sylvania State University. We have
studied two structures where the active layer was based on poly(3-hexylthiophen)
(P3HT) and [6-6]-phenyl-C61-butanoate of methyl (PCBM) materials. We have
performed considerable efforts to run the program and obtain favorable efficiencies.
Several parameters have been taken into account such as the thickness of the active
layer and temperature. The obtained results were good and in agreement with
literature.Diplôme : Magistère En ligne : ../theses/physique/GUA6844.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10142 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité GUA/6844 GUA/6844 Thèse Bibliothèque principale Thèses Disponible
Titre : Déposition et étude des couches pérovskites pour le photovoltaïque. Type de document : texte imprimé Auteurs : Itidel Belaidi, Auteur ; Nadhir Attaf, Directeur de thèse ; Fatima Khelfaoui, Directeur de thèse Mention d'édition : 07/07/2021 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2021 Importance : 175 f. Format : 30 cm. Note générale : Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : pérovskites organiques-inorganiques cellules solaires photovoltaïque hétérojonction perovskite organic-inorganic photovoltaic heterojunction البيروفسكايت الخلايا العضوية غير العضوية الخلايا الشمسية الخلايا الكهروضوئية غير المتجانسة Index. décimale : 530 Physique Résumé :
In recent years, hybrid organic-inorganic perovskites have emerged as a new class of semiconductors with very interesting optoelectronic properties for photovoltaic devices. This thesis focuses on the deposition of CH3NH3PbI3 perovskite materials by spin-coating on glass substrates. The effects of the nature of the solvent and the speed of rotation on the morphology of the films and the structure are studied. Two solvents are used:N, N-dimethylformamide (DMF) and a mixture of dimethylsulfoxide (DMSO) with DMF. The rotation speed varies between 700 and 2000 rpm.Scanning electron microscopy (SEM) observations indicate that the films prepared are not continuous with varying morphologies; the films are formed of elongated fibers. The structural characterization of the films revealed that the latter have a tetragonal structure of the prepared perovskite with a preferential orientation towards (110). The optical and electrical characterizations have shown that the CH3NH3PbI3 films deposited by spin coating have good optoelectronic properties. good absorbance in the visible range with an optical gap equal to1.54eV. The electrical characterizations have shown that the CH3NH3PbI3 films prepared are resistive; the thin layers of CH3NH3PbI3 turn out to be very sensitive to several factors: humidity, oxygen, light irradiation, On the other hand, the study of the heterojunction was made by the IV and CV techniques which made it possible to determine the electrical parameters heterojunction.
Note de contenu : Annexes. Diplôme : Doctorat En ligne : ../theses/physique/BEL7831.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11663 Déposition et étude des couches pérovskites pour le photovoltaïque. [texte imprimé] / Itidel Belaidi, Auteur ; Nadhir Attaf, Directeur de thèse ; Fatima Khelfaoui, Directeur de thèse . - 07/07/2021 . - جامعة الإخوة منتوري قسنطينة, 2021 . - 175 f. ; 30 cm.
Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : pérovskites organiques-inorganiques cellules solaires photovoltaïque hétérojonction perovskite organic-inorganic photovoltaic heterojunction البيروفسكايت الخلايا العضوية غير العضوية الخلايا الشمسية الخلايا الكهروضوئية غير المتجانسة Index. décimale : 530 Physique Résumé :
In recent years, hybrid organic-inorganic perovskites have emerged as a new class of semiconductors with very interesting optoelectronic properties for photovoltaic devices. This thesis focuses on the deposition of CH3NH3PbI3 perovskite materials by spin-coating on glass substrates. The effects of the nature of the solvent and the speed of rotation on the morphology of the films and the structure are studied. Two solvents are used:N, N-dimethylformamide (DMF) and a mixture of dimethylsulfoxide (DMSO) with DMF. The rotation speed varies between 700 and 2000 rpm.Scanning electron microscopy (SEM) observations indicate that the films prepared are not continuous with varying morphologies; the films are formed of elongated fibers. The structural characterization of the films revealed that the latter have a tetragonal structure of the prepared perovskite with a preferential orientation towards (110). The optical and electrical characterizations have shown that the CH3NH3PbI3 films deposited by spin coating have good optoelectronic properties. good absorbance in the visible range with an optical gap equal to1.54eV. The electrical characterizations have shown that the CH3NH3PbI3 films prepared are resistive; the thin layers of CH3NH3PbI3 turn out to be very sensitive to several factors: humidity, oxygen, light irradiation, On the other hand, the study of the heterojunction was made by the IV and CV techniques which made it possible to determine the electrical parameters heterojunction.
Note de contenu : Annexes. Diplôme : Doctorat En ligne : ../theses/physique/BEL7831.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11663 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BEL/7831 BEL/7831 Thèse Bibliothèque principale Thèses Disponible
Titre : Deposition of ZnO thin films for treatment of water. Type de document : texte imprimé Auteurs : Fouzia Bourfa, Auteur ; Nadhir Attaf, Directeur de thèse Mention d'édition : 27/12/2020 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2020 Importance : 199 f. Format : 30 cm. Note générale : 1 copies imprimées disponibles
Langues : Anglais (eng) Catégories : Français - Anglais
PhysiqueTags : physique:Sciences des matériaux Materials science: Semi-conductor Oxyde de Zinc Couches minces Nanostructuré Photocatalyse Activité antibactérienne Cellules solaires Zinc Oxide Thin films Nanostructured Photocatalysis Antibacterial activity Solar cells أكسيد الزنك الأغشية الرقيقة البنيةالنانوية التحفيز الضوئي النشاط المضاد للبكتيريا الخلايا الشمسية Index. décimale : 530 Physique Résumé :
The semiconductor heterogeneous photocatalytic technique is a kind of green technology that has been used to solve environmental pollution problems. The present study focuses on the screening of potentially photocatalytic ZnO thin films and nanostructures by using them to degrade organic dyes. Primarily Zinc chloride, nitrate and acetate salts were tested for their photocatalytic activity through the degradation of Red reactive and Methylene Blue (MB) in aqueous solution. The select compounds which are deposited by spray pyrolysis show considerable photodegradation efficiency. The studied different parameters such as concentration of dye, time deposition, salt source and seed layer position have a great effect on the photodegradation of this dye. Hydrothermal ZnO nanostructured were also tested for decolorization of MB and the results are very encourage especially for ZnO Nanorods (acetate salt) and ZnO nanoflowers for water treatment and gas sensing. Undoped and ZnO: Ag NPs films on glass and tissue, which prepared by sol-gel, show the capability of zinc oxide and silver nanoparticles to resist the growth of Gram – of K. pneumonia and E. coli by their inhibition zone which reaches 23 mm. Zinc nitrate as a precursor was used to prepare the Al/ ZnO/p-Si heterojunction by ultrasonic spray in order to investigate the photovoltaic parameters of the solar cell of this device. The I-V measurements indicate that the ideality factor n is 1.39 and the barrier height ϕb is 0.67 eV. The ϕb from I-V measurement and Norde’s function (0.69 eV) are in well agreement. While the series resistance Rs obtained from Norde’s function is found 1194 Ω. The diode has a good rectification property,photovoltaic behavior, photosensing and photoresponsivity properties. The electrical and photoelectric characterization confirms that this device is a very suitable candidate as a photodiode, photosensor applications and optoelectronic applications. The ISC and VOC were varied 11.12- 50.73 µA and 125.33- 185.22 mV for various illuminations. The C-V analysis shows that capacitance and conductance of the Al/ZnO/ p-Si diode depends on voltage and frequency. The Na, ϕb and Vbi of this structure are increased with the increasing frequencies.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/BOU7776.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11610 Deposition of ZnO thin films for treatment of water. [texte imprimé] / Fouzia Bourfa, Auteur ; Nadhir Attaf, Directeur de thèse . - 27/12/2020 . - جامعة الإخوة منتوري قسنطينة, 2020 . - 199 f. ; 30 cm.
1 copies imprimées disponibles
Langues : Anglais (eng)
Catégories : Français - Anglais
PhysiqueTags : physique:Sciences des matériaux Materials science: Semi-conductor Oxyde de Zinc Couches minces Nanostructuré Photocatalyse Activité antibactérienne Cellules solaires Zinc Oxide Thin films Nanostructured Photocatalysis Antibacterial activity Solar cells أكسيد الزنك الأغشية الرقيقة البنيةالنانوية التحفيز الضوئي النشاط المضاد للبكتيريا الخلايا الشمسية Index. décimale : 530 Physique Résumé :
The semiconductor heterogeneous photocatalytic technique is a kind of green technology that has been used to solve environmental pollution problems. The present study focuses on the screening of potentially photocatalytic ZnO thin films and nanostructures by using them to degrade organic dyes. Primarily Zinc chloride, nitrate and acetate salts were tested for their photocatalytic activity through the degradation of Red reactive and Methylene Blue (MB) in aqueous solution. The select compounds which are deposited by spray pyrolysis show considerable photodegradation efficiency. The studied different parameters such as concentration of dye, time deposition, salt source and seed layer position have a great effect on the photodegradation of this dye. Hydrothermal ZnO nanostructured were also tested for decolorization of MB and the results are very encourage especially for ZnO Nanorods (acetate salt) and ZnO nanoflowers for water treatment and gas sensing. Undoped and ZnO: Ag NPs films on glass and tissue, which prepared by sol-gel, show the capability of zinc oxide and silver nanoparticles to resist the growth of Gram – of K. pneumonia and E. coli by their inhibition zone which reaches 23 mm. Zinc nitrate as a precursor was used to prepare the Al/ ZnO/p-Si heterojunction by ultrasonic spray in order to investigate the photovoltaic parameters of the solar cell of this device. The I-V measurements indicate that the ideality factor n is 1.39 and the barrier height ϕb is 0.67 eV. The ϕb from I-V measurement and Norde’s function (0.69 eV) are in well agreement. While the series resistance Rs obtained from Norde’s function is found 1194 Ω. The diode has a good rectification property,photovoltaic behavior, photosensing and photoresponsivity properties. The electrical and photoelectric characterization confirms that this device is a very suitable candidate as a photodiode, photosensor applications and optoelectronic applications. The ISC and VOC were varied 11.12- 50.73 µA and 125.33- 185.22 mV for various illuminations. The C-V analysis shows that capacitance and conductance of the Al/ZnO/ p-Si diode depends on voltage and frequency. The Na, ϕb and Vbi of this structure are increased with the increasing frequencies.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/BOU7776.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11610 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/7776 BOU/7776 Thèse Bibliothèque principale Thèses Disponible
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